Home / Standards / GB/T 20887.4-2022 GB/T 20887.4-2022 Active Continuously hot rolled high strength steel sheet and strip for automobile—Part 4: Transformation induced plasticity steel 汽车用高强度热连轧钢板及钢带 第4部分:相变诱导塑性钢 Standard Type GBT ICS 77.140.50 CCS H46 Status 现行 Issue Date 2022-04-15 Implementation 2022-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A